Abstract
A new regioselective one-pot procedure to synthesize pyranoquinolinones from readily available 2-alkynyl 3-formylquinolines under mild NaClO2/H2O2 conditions in good yields has been explored. This reaction sequence, involving oxidation followed by regioselective electrophilic 6-endo-dig cyclization is more efficient over the traditional Pd(0)-mediated synthesis. When scavenger-free conditions were used, unusual chlorinated furoquinolinone derivatives were obtained.
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